I made this for my daughter's teacher as a gift at the end of the year. I first searched for the original game (and wanted to replace the pictures) only to discover that I don't have it anymore. So I tried making one myself.

I know this is an existing game and honestly I have no idea if I can share this model but it would be such a shame not to and I kinda like my version better :p

I love how sturdy the whole thing turned out to be. I printed the board in PLA+ and the frames in Fiberlogy's Impact PLA. The frames snap very firmly into their slots and are not loose but friction fit in the board. This way the thing does not make any sound when handling and the frames flip open with a resistance and holding force similar to a laptop lid. 

The only downside is that you sadly cannot achieve the satisfying frame slap down and I know many will not like this. But you might try printing the frame a little bit bigger (only in X-axis) and you should be able to get a looser fit

Board dimensions are 200x223,5x10mm

Frames fit a picture of 24,5mm x 39mm and have a slot to slide them in. The guides have some narrower parts for fixating the picture a little bit, but you can use some double sided tape if you do not want to change or randomize the pictures regularly

The have a hard stop at 65° for a good viewing angle and clean look when opened. 

Print the board with sufficient walls in order to make the thinner sides full plastic. This gives the best rigidity and makes for a seemingly unbreakably board. 

Print the frames upright with some glue to the bed for best adhesion. 

Somewhat satisfying bed release of the frames: 

I've done 4 prints like this on a PEI sheet and never had one falling over during printing. Use PLA with strong layer adhesion at the top end of it's temperature rating. I've grown to love Fiberlogy's Impact PLA for it's great impact resistance. The frames flex a little bit but feel rock solid even though the backside of the pictures is only two walls thick (1mm)

Boring assembly video, but informative nonetheless: